JPS6042048A - Phase matching apparatus for multicolor printing press - Google Patents

Abstract

PURPOSE:To provide a multicolor printing press eliminating interval adjustment between printing sections/regardless of variation in the printing length by providing a phase matching mechanism between the adjacent printing sections to make the printing sheet length therebetween integral times as large as the printing length in the multicolor printing press provided with a plurality of printing sections having printing cylinders and impression cylinders. CONSTITUTION:In a multicolor printing press provided with a plurality of printing sections comprising printing cylinders 22 and impression cylinders 23, phase matching mechanisms 181...18n-1 for a printing sheet between the printing sections. The phase matching mechanisms 181...18n-1 are, for example, made up of a pair of guide rolls 19a and 19b and one adjuster roll 20. Changing the position of the adjuster roll 20 with the guide rolls 19a and 19b brings the same effect as would the alteration of the interval between the printing sections on both sides thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a multicolor printer that adjusts the sheet length between printing sections in a multicolor printing device that performs multicolor printing on continuous sheets to align the printing position of each printing section. The present invention relates to a phase alignment device for a printing device.

As shown in Fig. 1, a conventional multi-color printing device has one impression cylinder 1 and the same number of plates (2) as the number of printing colors, which are placed in pressure contact with each other. When successive sheets 4 pass through the printing plate 3, printing is performed on the sheets 4.

The impression cylinder 1 and each plate cylinder 2 are driven by a single electric motor (not shown) via a drive transmission mechanism using a plurality of gears so that printing can be performed normally by synchronizing the impression cylinders 1 and 2. .

Since the diameter of the plate cylinder 2 is determined by the printing length, each time a printing plate with a different printing length is created, a printing plate with a section that matches the printing section must be created, resulting in an expensive problem. . In addition, each time printing with a different printing length is performed, the heavy plate cylinder is removed and the next plate to which the printing plate is attached is attached to the pressure plate, and the sheet formed by each printing plate is attached. Fine adjustment is required to match the phase between each plate cylinder so that there is no misalignment in the printing position. Furthermore, there is also the hassle of storing many plate cylinders.

This invention was made in view of the above circumstances, and is used in a multi-color printing device that is provided with a plurality of printing sections so as to eliminate the need for plates for each printing length. It is an object of the present invention to provide a phase adjustment device for a multicolor printing system ML, which can perform multicolor printing by aligning printing positions in each printing section by setting the length to an integral multiple of the length.

The present invention will now be described based on embodiments shown in the accompanying drawings.

As shown in Figure 2; ．． ', 4 Sheet 1
0 is sent to a pair of second feed rolls 13 as a sheet feeding device by a pair of first feed rolls 11 and a first accumulation roll 12, and then supplied to n printing units 141, 142, . . . 1411. The sheet is supplied to the next process via a pair of first pull rolls 15, a second accumulation roll 16, and a pair of second pull rolls 17 as sheet discharge devices. Each printing section 141, 142...
- Between 14n, there are phase alignment mechanisms 181, 182 that make the sheet length between adjacent printing sections an integral multiple of the printing length...
18n is provided, and each phase adjustment mechanism is located on the sheet 10.
First-stream paper roll 19a and downstream paper roll 19
An azimuth scroll 20 whose position can be adjusted in the vertical direction between B and E is provided, and by adjusting the position of the azimuth scroll 20, the sheet length between adjacent printing sections is made an integral multiple of the printing section. The first and second accumulation rolls are configured to move in the L direction if the tension in the seat 10 is large, and move downward in response to the tension in the seat 10, so that if the tension in the seat 10 is small, they move downward. .

Each of the printing units 141, 142... has a circumferential length that is equal to or longer than the printable length, and includes a plate cylinder 22 that fixes the printing plate 21, and a sheet 10 that is pressed against the plate cylinder 22. an impression cylinder 23, a plate cylinder 22, a dryer 24 provided downstream of the impression cylinder 23 and for drying the ink on the sheet 10 printed by the printing plate 21, and a plate; provided near the plate I11'122; It consists of an ink roll 26 that applies ink from an ink tank 25 to the plate 21 of the plate cylinder 22, and is configured to print on the supplied sheet 10 with the plate 21, then dry the ink and discharge it.

Each plate cylinder 22 of the printing units 141, 142, etc. is connected to a plate cylinder motor 27 by a rotation transmission mechanism (not shown) such as a gear, a sprocket, and a chain, and is operated synchronously. section (Printed section 1 in swim 52 diagrams)
The amount of rotation of the plate 22 is detected by a first pulse generator 28 provided on the plate cylinder 22). In addition, each of the second feed roll 13, the first pull roll 15, and the phase matching mechanism 181 to 13n-1 is o-/L/19.
The impression cylinders 23 of a, i9b and printing sections 141 to 14n are fitted with gears, sprockets, etc. so that their peripheral speeds match.・
The second feed roll 13, the first pull roll 15, the paper rolls 19a, 19b, or the pressure A second pulse generator 3o is connected to one of the cylinders 23 (the pull roll 15 in FIG. 2). Furthermore, the above-mentioned printing department, 141,
A printing start detector 31 for detecting the printing start point of the printing plate 21 is provided at or near any of the plate cylinders 22 142 . Note that the first feed roll 11 and the second pull roll 17 are driven and assisted by the sheet feeding motor 32.

The above-mentioned phase adjustment mechanism is explained in detail in FIG. 3. Two threaded rods 33a, 33b are rotatably supported on the floor, and an azimuth scroll 2° is rotatably supported on each threaded rod 33a, 331). The supporting nut member 34 has each threaded rod aaa,
They are screwed together so that they move up and down as 33b rotates.

Bevel gear 3 provided at the bottom of the threaded rods 33a, 331)
A bevel gear 38 of a rotating shaft 37 whose rotation is controlled by a phase matching motor 36 is meshed with each of the gears 5 and 5 . Therefore, when the motor 36 is rotated, the adjuster scroll 2o is moved up and down, and the sea I/length between the printing sections can be adjusted.

In addition, the sheet length t between the printing sections is as shown in FIG.
The distance to 9a is tl, the distance from the downstream paper roll 191) to the printing point of the downstream mark 'ii'1 is t2,
paper rolls 19a, 191) asia scroll 2
The height of the paper roll 19a is h.

191] is 11, and the radius of the azimuth scroll 2° is r2, the distance between the paper a.-rolls 19a and 191) is 2r2, and the azimuth scroll 2o is
1 = L1 + L 2 + 211 + π (rl + r2
)...(1), and from this formula, the height 11 is h=-1-(L++42)-π(r1+r2)-(
2) Since it can be stopped, in equation (1), set the sheet length t to be an integer multiple of the print length LO, and then substitute it into equation (2) to calculate the height h, which becomes the height IN. The azimuth scroll 20 may be adjusted as follows.

In addition, by emitting pulses to the motor 36 corresponding to the rotational slip of the rotary shaft 37, the azimuth scroll 2
A pulse generator 39 is provided to know the height of zero.

This invention has the following second configuration, and its control etc. will be explained next.b) The circumferential length of the plate cylinder 22 and the printing length Lo are set in the setting device 40, and each of the phase adjustment mechanisms 181 to 18n-1 is set. The azimuth scroll 20 is adjusted so that the sheet length between adjacent printing sections 141 and 1411 is an integer multiple of %Lo. A predetermined plate 2 is mounted on the plate cylinder 22 of each printing section 141 to 14n.
1 is fixed, and ink of a predetermined color is put into the ink tank 25.

At the same time, set the plate cylinder motor 27 using the speed setting device 41, turn on the operation switch, etc., and start the printing plate i[11.
The plate cylinder motor 27 is driven at the rotational speed set by the speed setting device 41, so that the circumferential speed of the plate cylinder 22 is Vn (strictly speaking, it is the circumferential speed of the printing circle of the plate 21, but hereinafter simply referred to as the plate). Torso 22
It is called the circumferential speed VB. ), and the sheet feeding motor 32
is rotated by the calculation unit 42 at a value corresponding to one time the plate cylinder motor 27 until it enters the first feed roll 11.
Let it be the second pull Vn. In addition, the control motor 29 is
Since it is controlled by the wholesaler section 43 as shown in FIG.
Regarding the sheet 10 in the printing sections 141 to 14n (the sheet 10 between the second feed roll 13 and the first pull roll 15), from the printing start point '1'' ++ to the printing end point 'l'' 12, the speed is It is made to coincide with the circumference 4VB of the cylinder 22, and the amount of movement thereof becomes the printing length Lo, and on the other hand, from the printing end point 'l'' + 2 to the next printing start point T21
Until then, it is decelerated and once moves backward, and then it is accelerated again, and at the latest at the next printing start point T21, it is brought to match the circumferential speed VB of the plate cylinder 22, and one forward movement becomes zero. Therefore, sheet 1
0 is mark 1dlJ starting point ``1'' to printing end point ``1''
'12, printed by printing 11i15141-1411, from printing end point TI2 to next printing start point 'I
"2] Please perform a reverse operation etc. and start printing ']' 2
With +, the printing start part of sheet 10 and the printing start part of plate 1#, 21 are made 2β so that they match. By repeating such control, multicolor printing is continuously performed on the sheet 10 discharged from the second pull roll 17.

In FIG. 2, the preset counter 44 is marked 41:
When the start signal is issued, the printing length of 1.0 is read and the pulse signals are counted, and when the counted value reaches printing length LO, a mark 1 is placed indicating that printing of plate 1 and 21 has been completed.
Generates iIXIJ end signal. In addition, the pulse discriminator 4
5, the pulse generator 30 determines either normal rotation or reverse rotation (that is, the moving direction of the sheet) and outputs either a positive pulse signal or a negative pulse signal.

'' The two-note arithmetic control section 43 will be described in detail below. This calculation fb control unit 43 calculates the circumference 1iL and printing length LO from the setting device 40.
, the print end signal from the preset counter 41, the first pulse low-3-φ1 from the first pulse generator 28, and either the positive pulse signal φ21 or the negative pulse signal φ22 from the O pulse discriminator 42. , based on these signals, a first moke signal is generated to control the rotation of the control motor 29. As shown in FIG.
From the printing start point 'l''1] to the printing end point 'I''12, the speed VA of sea I·10 is the operating speed of the printing device. Match the circumference 4vn of the plate cylinder 22, n] printing end point T
From +2 to the next printing start point ゛1''21, f'+iJ
After decelerating and reversing the advancing sheet 10, 1) accelerating it in the forward direction, it is possible to reach the printing starting point ゛I at the latest.
"2" Now match the circumferential speed VB of the plate 1 word 22, and move from the printing end point 'l'+2 to the next printing start point '1'2
This is a signal that drives the control motor 29 via the drive unit 46 so that the movement rate of the first sheet 10 is zero.

That is, from the printing start point '■'11 to the printing end point 'I' +
In 2, since the speed VA of the sheet 10 is made to match the circumferential speed VB of the plate cylinder 22, the movement of the sheet 10 is to a certain rectangle, Tll, TI2, 13 (D area is set length I-0 and null).

In addition, at the next printing start point 1-21 from the printing end point T+2, the speed VA of sheets 1 and 10 is set to the printing end point T+2.
Decelerate at point C, set the speed to zero, move backward after passing point C, set constant speed -■ at point I (the sign is negative because forward movement is positive), and point E After decelerating the speed in the reverse direction and bringing the speed to zero at point F, the speed is again accelerated in the forward direction and brought to point G, which is before the next printing start point T21, to match the circumferential speed VB of the plate cylinder 22. This state is maintained until 1-1. At this time, the triangle 13']-+2C is the positive distance traveled by the sheet 10 in the forward direction after the printing end point 'r12.
The control motor 29 is moved toward the area side so that the sum of the areas of the rectangle G F T+2II (7) and the area of the rectangle CI) E F, which is the negative distance traveled in the reverse direction, are made equal. Therefore, from the print end point 1"+2 to the next print start point'
The movement of the sheet 10 up to 1"21 becomes zero.Furthermore, the plate cylinder 22 rotates at the circumferential speed VB for one cycle from the printing start point D[) 1' + + to the next printing start point ゛I"21. The area of the 4fI] shape ΔTll T2+ 11 that occurs when The rotating and moving lever of the sheet 10 is longer than the mark 16.

becomes. The same rule applies after the next printing start point T, +2]
is repeated.

Note that the above print length is not longer than the length of one print when the same printing is performed continuously on a sheet without leaving a certain margin between each print, and the printed portion is The length is the sum of the length of the blank space required when cutting out the box, the length of the margin required for gluing, etc. required when finally manufacturing the box, and the length of the part that is actually printed. shows.

As described above, this invention is provided with phase matching mechanisms 181 to 18n-+ between each stamp part 141 to 141, which makes the sheet length between adjacent printing parts 19r an integral multiple of the printing length. Even when performing multicolor printing using the mark 1 hole 11 parts 141 to 140, the phases must be adjusted so that the printing start point of the sheet 10 is aligned with the plate 1 rule 21 of each mark 1 hole 141 to 14n. It is possible to perform multi-color printing/econtinuously.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a conventional example, FIG. 2 is an explanatory diagram showing an example of the present invention, FIG. 3 is an enlarged view of the main part of the present invention, and FIG. 4 is an explanatory diagram of phase alignment of the present invention. FIG. 5 is a waveform diagram showing an example of suppression according to the present invention. 10...Sheet, 141-14n...Printing section, 18
1-1) 3n-+...Phase matching mechanism, 191.19
1)...Penoku roll, 20...Adjuster roll, 21...Print plate, 22...Print cylinder, 23...Impression cylinder,
24... Dryer, 26... Ink roll, 27...
・Version! Feed motor, 28. 30... Noise generator, 29... Control/other use motor, 32... Sheet feed motor, 33a, 331)... Threaded rod, 34...
Nut member, 35. 38...Southeast of the umbrella, 36...Motor, 37...Rotation shaft. 4'! fif'l Applicant Renko Co., Ltd. Agent
Sickle 1) Text 2 Showa! September 24, 1958 Mr. Kazuo Wakasugi, Commissioner of the Japan Patent Office1, Indication of the case, Patent Application No. 151404 of 19882, Name of the invention, Phase alignment device for multicolor printing device 3, Person making the amendment Relationship to the case Patent Applicant address: 4-1-186 Omagari, Tsumajima-ku, Oichimai City Name (
Name] Rengo Co., Ltd. Name (74201 Br Physician Kama 1) Text 2 Telephone Daihan 06 (631) 0021 (Representative) 5゜Showa Year Month Day (Delivery date) 6. Number of inventions increased by amendment Contents of amendment 1 , Specification V) Page 7, line 5 is corrected to [h=-) (t-(tI+t2) -rc ('r, 10r2)) ...-12+. 2. Correct the "starting turn" in the 9th negative second line of the above to "starting point". 3. Change "01 version cylinder" from page 10, line 11 of the same page to "
The print cylinder is corrected. 4. Correct all figures in Figure 5 of the drawing as per your request.

Claims (1)

[Claims] (1) Multiple printing units are provided, each consisting of a printing cylinder to which a printing plate marked 1611 is fixed to the running sheet, and an impression cylinder step that brings the sheet into contact with the printing plate, and multicolor printing is performed on the sheet passing through each printing unit. A phase alignment device for a multi-color printing device, which is a device u for a multi-color printing device, comprising a phase alignment mechanism that makes the sheet length between adjacent printing units an integral multiple of the printing length, and is provided between each printing unit in contact with the sheet.